The superior injury threshold of BBO crystals is particularly essential in environments where by substantial-depth lasers are definitely the norm. Standard elements may possibly falter, degrade, and even break underneath these types of intensities.

The size from the SHG crystal noticeably influences the spectral width on the reference pulse, or alternatively the bandwidth in the SHG filter.

Howdy, thank you for making contact with Thorlabs. The wavelength ranges of the antireflective coatings on these β-BBO crystals align With all the respective wavelength bands that these crystals are optimized for. Requests for customizations can be made by achieving out to us at [email protected]

A: A significant damage threshold assures the crystal can cope with more electric power without degrading, leading to for a longer time lifespan and dependable overall performance.

Determine 23: This diagram illustrates a beam's focal area in a uniaxial birefringent product. Straight strains, representing rays, are drawn throughout the center from the beam waistline. Given that the beam diverges in the beam waistline, the Electrical power within the beam is distributed more than a larger cross sectional place.

The efficiency with the SHG method decreases substantially as the elemental beam diverges from its focus, Considering that the pulse Electrical power is dispersed across a bigger beam cross section.

The spatial stroll-off angle depends upon the dimensions with the beam and the crystal size. When the angle may be major, it is usually tiny, ordinarily around the purchase of 10 mrad, and may be neglected.

These properties make BBO crystals hugely attractive in different purposes, from laser frequency conversion to electro-optic modulation. Their vast transparency vary enables them to operate with a broad number of laser wavelengths, even though their higher problems threshold guarantees they might manage superior-electrical power laser beams without the need of degradation.

Because the refractive index does not range linearly with frequency in dispersive crystals like β-BBO, it really is not possible to optimally period match every more info single frequency inside the input pulse's spectral vary Along with the corresponding second harmonic frequency in the created pulse.

Fluorescence excitation is yet another realm where the 266nm generation showcases its importance. Fluorescence consists of the absorption of light by a material and the subsequent emission of sunshine at a distinct wavelength. The 266nm mild is highly helpful in remarkable selected fluorescent resources, building them glow brightly and allowing for his or her detection and research.

This calculation assumes a uniform beam depth profile. You have to now alter this Electrical power density to account for hotspots or other nonuniform intensity profiles and around determine a utmost energy density. For reference a Gaussian beam normally incorporates a most Electrical power density that is twice that from the 1/e2 beam.

The angular articles of the resultant SHG pulse, or beam, while in the dimension of the angular filter is diminished from a perfect scenario. In the perpendicular dimension, the SHG beam preserves the angular articles of your input beam, due to the fact there’s no angular filter in that dimension. A diverging beam with asymmetric NA’s, i.e. within the horizontal and vertical dimensions, contributes to an elliptical beam.

The Actual physical, chemical, optical, and thermal Homes from the α -BBO are comparable to These of the BBO crystals, but the α -BBO would not exhibit the nonlinear optical properties as a result of central symmetry of its crystal composition.

Furthermore, the structural and compositional characteristics of BBO deliver it with extraordinary thermal balance and resistance from environmental challenges.